Larkin sent a letter to Gov. Chris Christie this morning removing himself from the post, according to a copy of the letter provided by his office.

"Governor Chris Christie," Larkin wrote. "It is with deep regret I find it necessary to resign as Sheriff of Mercer County, effective October 30, 2010. Family obligations, health and personal issues must take priority. It has been an honor and privilege to serve the citizens of Mercer County. I am sure the capable strong staff under the leadership of the First Undersheriff John A. (Jack) Kemler will serve the citizens of Mercer County well until an appointment is made. Very truly yours, Kevin C. Larkin Sheriff."